Rotate camera around animation with separate motion blur?
Bullet Time-without time



You can make a fake blur by distorting you key moving object. In this example I have used a lattice to bend the ball



Then modify your material with a graduated blend texture, to make the ball transparent at the end of its fake motion.



Then your blur will cast the right shadow in 3D space, while a vector blur would not.





In order to 'fill in' the centre of the blurred ball you can add a Volumetric shader - similar to rendering smoke - using the same 'Factor' used to mix between the Diffuse and Transparent shaders to drive the Density.



Maths nodes are used to manipulate the 'mix' factor to generate the Density and an RGB node can be used to ensure the same color us used for the Diffuse and the Volumetrics.

Increase the Render properties Light Path Volume bounces to 3 or 4 and this should produce the following results :